<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <title>2.2 简单适配实现</title>
    <style>
        * {
            box-sizing: border-box;
            padding: 0;
            margin: 0;
        }

        .header-container {
            height: 2.5rem;
            background-color: rgba(222, 24, 27, 0.9);
        }
    </style>
    <script>
        // 1rem = viewWidth / 18.75
        // console.log(document.documentElement.getBoundingClientRect().width);
        // console.log(window.innerWidth);

        // var ratio = 18.75;
        // var viewWidth = document.documentElement.getBoundingClientRect().width || window.innerWidth;

        // document.documentElement.style.fontSize = viewWidth / ratio + 'px';

        // setRemUnit();

        // window.addEventListener('resize', setRemUnit);

        // function setRemUnit() {
        //     var docEl = document.documentElement;
        //     var ratio = 18.75;
        //     var viewWidth = docEl.getBoundingClientRect().width || window.innerWidth;

        //     docEl.style.fontSize = viewWidth / ratio + 'px';
        // }
    </script>
    <script src="js/simple.js"></script>
</head>
<body>
    
    <header class="header-container"></header>

</body>
</html>